[vtk-developers] vtkLightKit checked in

[Ken Martin]

Hello folk,

A reminder that significant changes or additions to VTK should be 
documented (a brief summary) in the FAQ entry on "what has changed since 
3.1.2" , the password is hedgehog. In contrast to the last release where we 
had no summary of changes, we actually have a decent list going this time.

- Thanks
- Ken

At 02:01 PM 9/6/00 -0400, Michael Halle wrote:

>Thanks.
>
>As for the elevation/azimuth stuff, I'll add some more explanation to
>the documentation, then maybe hack the demo program with some of your
>suggestions.
>
>Here's basically how it works.  All angles are relative to the camera.
>The light is always shining on the lookat point.  A light at
>elevation=0, azimuth=0 is a headlight.  Increasing elevation moves the
>light on an arc up and over object (well, the lookat point), so that
>elevation=90 is directly above the object (shining down on it).
>Similarly, a negative elevation moves the light position down under
>the object.  Azimuth changes the longitude of the light: negative
>moves the light left, positive moves it right.
>
>                                                         --Mike
>
>
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